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Monthly weather forecast in Boulder
30 days
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
30 days
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun
Sunday
Mon
Monday
Tue
Tuesday
Wed
Wednesday
Thu
Thursday
Fri
Friday
Sat
Saturday
8
+20
+13
8 September, sun
+20
+13
Feels like
+16
647 mmHg
40%
5
m/s
SE
8 September, Sunday. day, 20°; night, 13°; clear
9
+19
+12
9 September, mon
+19
+12
Feels like
+15
648 mmHg
37%
5
m/s
SE
9 September, Monday. day, 19°; night, 12°; partly cloudy
10
+18
+11
10 September, tue
+18
+11
Feels like
+15
649 mmHg
46%
5.1
m/s
SE
10 September, Tuesday. day, 18°; night, 11°; clear
11
+17
+11
11 September, wed
+17
+11
Feels like
+14
649 mmHg
51%
4.6
m/s
E
11 September, Wednesday. day, 17°; night, 11°; clear
12
+18
+11
12 September, thu
+18
+11
Feels like
+15
647 mmHg
51%
5.3
m/s
SE
12 September, Thursday. day, 18°; night, 11°; clear
13
September
+26
+12
13 September, fri
+26
+12
Feels like
+17
627 mmHg
30%
4.7
m/s
E
Climate normal
+17
+11
13 September, Friday. day, 26°; night, 12°; mostly clear
14
+29
+13
14 September, sat
+29
+13
Feels like
+20
631 mmHg
29%
4.4
m/s
E
Climate normal
+16
+10
14 September, Saturday. day, 29°; night, 13°; mostly clear
15
+28
+16
15 September, sun
+28
+16
Feels like
+20
629 mmHg
32%
3.9
m/s
W
Climate normal
+18
+12
15 September, Sunday. day, 28°; night, 16°; light rain
16
+29
+17
16 September, mon
+29
+17
Feels like
+20
621 mmHg
38%
5
m/s
W
Climate normal
+18
+12
16 September, Monday. day, 29°; night, 17°; thunderstorm
17
+27
+14
17 September, tue
+27
+14
Feels like
+18
618 mmHg
39%
6.5
m/s
W
Climate normal
+18
+11
17 September, Tuesday. day, 27°; night, 14°; rain
18
+28
+14
18 September, wed
+28
+14
Feels like
+14
619 mmHg
31%
7.4
m/s
W
Climate normal
+19
+12
18 September, Wednesday. day, 28°; night, 14°; overcast
19
+25
+12
19 September, thu
+25
+12
Feels like
+13
618 mmHg
34%
7.8
m/s
W
Climate normal
+19
+11
19 September, Thursday. day, 25°; night, 12°; rain
20
+19
+11
20 September, fri
+19
+11
Feels like
+10
621 mmHg
50%
5.8
m/s
W
Climate normal
+18
+12
20 September, Friday. day, 19°; night, 11°; light rain
21
+19
+10
21 September, sat
+19
+10
Feels like
+11
625 mmHg
66%
4.8
m/s
W
Climate normal
+17
+11
21 September, Saturday. day, 19°; night, 10°; partly cloudy
22
+21
+9
22 September, sun
+21
+9
Feels like
+12
624 mmHg
58%
4.5
m/s
W
Climate normal
+16
+9
22 September, Sunday. day, 21°; night, 9°; partly cloudy
23
+24
+12
23 September, mon
+24
+12
Feels like
+14
624 mmHg
52%
5.3
m/s
W
Climate normal
+17
+11
23 September, Monday. day, 24°; night, 12°; mostly clear
24
+26
+8
24 September, tue
+26
+8
Feels like
+14
623 mmHg
45%
8.3
m/s
W
Climate normal
+17
+11
24 September, Tuesday. day, 26°; night, 8°; mostly clear
25
+15
+9
25 September, wed
+15
+9
Feels like
+8
548 mmHg
68%
2.1
m/s
SE
Climate normal
+18
+12
25 September, Wednesday. day, 15°; night, 9°; rain
26
+12
+7
26 September, thu
+12
+7
Feels like
+8
549 mmHg
83%
3.8
m/s
SE
Climate normal
+17
+11
26 September, Thursday. day, 12°; night, 7°; rain
27
+15
+8
27 September, fri
+15
+8
Feels like
+8
547 mmHg
72%
2.4
m/s
W
Climate normal
+16
+11
27 September, Friday. day, 15°; night, 8°; rain
28
+10
+7
28 September, sat
+10
+7
Feels like
+7
544 mmHg
93%
2.3
m/s
SW
Climate normal
+16
+10
28 September, Saturday. day, 10°; night, 7°; rain
29
+10
+4
29 September, sun
+10
+4
Feels like
+4
545 mmHg
88%
4
m/s
W
Climate normal
+17
+10
29 September, Sunday. day, 10°; night, 4°; rain
30
+14
+2
30 September, mon
+14
+2
Feels like
+7
548 mmHg
62%
1.7
m/s
NW
Climate normal
+16
+9
30 September, Monday. day, 14°; night, 2°; clear
1 October
+14
+6
1 October, tue
+14
+6
Feels like
+6
550 mmHg
48%
2.3
m/s
W
Climate normal
+14
+8
1 October, Tuesday. day, 14°; night, 6°; clear
2
+15
+7
2 October, wed
+15
+7
Feels like
+6
548 mmHg
46%
3.6
m/s
W
Climate normal
+14
+9
2 October, Wednesday. day, 15°; night, 7°; clear
3
+16
+8
3 October, thu
+16
+8
Feels like
+8
548 mmHg
51%
2.3
m/s
SE
Climate normal
+14
+6
3 October, Thursday. day, 16°; night, 8°; light rain
4
+14
+7
4 October, fri
+14
+7
Feels like
+6
545 mmHg
60%
3.9
m/s
SW
Climate normal
+12
+6
4 October, Friday. day, 14°; night, 7°; partly cloudy
5
+9
+4
5 October, sat
+9
+4
Feels like
+2
544 mmHg
79%
5
m/s
W
Climate normal
+11
+5
5 October, Saturday. day, 9°; night, 4°; partly cloudy
6
+13
+5
6 October, sun
+13
+5
Feels like
+6
549 mmHg
64%
2
m/s
W
Climate normal
+12
+6
6 October, Sunday. day, 13°; night, 5°; clear
7
+17
+6
7 October, mon
+17
+6
Feels like
+7
552 mmHg
46%
2.9
m/s
NW
Climate normal
+11
+5
7 October, Monday. day, 17°; night, 6°; clear
8
+15
+5
8 October, tue
+15
+5
Feels like
+7
549 mmHg
46%
3.2
m/s
W
Climate normal
+10
+4
8 October, Tuesday. day, 15°; night, 5°; clear
9
+13
+4
9 October, wed
+13
+4
Feels like
+4
542 mmHg
57%
4.2
m/s
SW
Climate normal
+10
+5
9 October, Wednesday. day, 13°; night, 4°; clear
10
+2
−4
10 October, thu
+2
−4
Feels like
−7
547 mmHg
61%
5.8
m/s
NW
Climate normal
+12
+7
10 October, Thursday. day, 2°; night, -4°; light snow
11
+7
0
11 October, fri
+7
0
Feels like
−3
550 mmHg
38%
4.2
m/s
NW
Climate normal
+10
+4
11 October, Friday. day, 7°; night, 0°; clear
12
+12
+2
12 October, sat
+12
+2
Feels like
+2
549 mmHg
51%
3.2
m/s
NW
Climate normal
+10
+4
12 October, Saturday. day, 12°; night, 2°; clear
Average for 30 days
15
sunny days
9
days with precipitation
6
cloudy days
15 sunny days; 9 days with precipitation; 6 cloudy days;
54
%
air humidity
4.2
m/s
Wind
W
12
mm of precipitation
(3% of annual average)
air humidity 54%; 12 millimeters of precipitation (3% of annual average); Wind westerly 4.2 Meters per second
Forecast in graphs
Temperature
Humidity, %
Wind, m/s
Pressure, mmHg
E
E
W
W
W
W
W
W
W
W
W
W
SE
SE
W
SW
W
NW
W
W
SE
SW
W
W
NW
W
SW
NW
NW
NW
13
Average data for 10 years
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
1
October
2
3
4
5
6
7
8
9
10
11
12
Daytime temperature
Night-time temperature
